Slight of Hand, Twist of Fate

Did people underestimate the erratic nature of the changeup when evaluating Ian Kennedy? It's his best secondary pitch, but it's a very difficult delivery to throw with precision on a consistent basis. I'm reading "Living on the Black" right now, the book about Mussina and Glavine, and I was surprised to find that Glavine, a no doubt Hall of Fame pitcher, claimed a total loss of control of his money pitch over a month long period in 2007. The same malady appears to have affected Kennedy. His change is in the dirt almost every time he tries throwing it. He's been pretty much an unarmed man on the mound this year.